.tt{
    margin: 20px auto;
    width: 800px;
    /*细线表格*/
    border-collapse: collapse;
}
.tt tr th,.tt tr td{
    border: 1px solid #cf5a9f;
    padding: 8px;
    text-align: center;
    font: 13px/25px "微软雅黑";
}
/*背景颜色的处理*/
.tt tr:hover{
     background-color: #565aff;
}